In the 'lsof' test suite, the 'LTlock' test consistently fails on my system, possibly related to the fact that I use 'btrfs' for my local filesystems. Here's the relevant build log excerpt:
--8<---------------cut here---------------start------------->8--- Optional tests: LTbigf ... OK LTdnlc ... /tmp/guix-build-lsof-4.94.0.drv-0/lsof-4.94.0-checkout/tests found: 100.00% OK LTlock ... lock mismatch: expected W, got " " lock mismatch: expected R, got " " lock mismatch: expected w, got " " lock mismatch: expected r, got " " Failed tests: 1 make: *** [Makefile:118: opt] Error 1 command "make" "standard" "optional" failed with status 2 note: keeping build directory `/tmp/guix-build-lsof-4.94.0.drv-0' builder for `/gnu/store/cgkl1prkfmaz7b7j37xlzyhh8nhqkdyw-lsof-4.94.0.drv' failed with exit code 1 build of /gnu/store/cgkl1prkfmaz7b7j37xlzyhh8nhqkdyw-lsof-4.94.0.drv failed --8<---------------cut here---------------end--------------->8--- The following commit made this into a fatal build error, which I agree is an improvement: --8<---------------cut here---------------start------------->8--- commit 2bf502138c9c8cad945866061772fe0e1f4b7175 Author: Tobias Geerinckx-Rice <m...@tobias.gr> Date: Mon Nov 23 05:05:41 2020 +0100 gnu: lsof: Make test failures fatal. * gnu/packages/lsof.scm (lsof)[source]: Add patch to make test suite failures stop the build. * gnu/packages/patches/lsof-fatal-test-failures.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. --8<---------------cut here---------------end--------------->8--- Previously, the same test failure occurred on my system with lsof-4.91, but the failure was ignored and I didn't notice it until now. Before that, our lsof-4.89 package did not run the test suite, so I do not know if it had the same bug. Mark